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Mexican poet and activist Javier Sicilia walks past riot police as he tries to make his way to the U.S. Embassy to deliver thousands of signatures and a letter in Mexico, City, Monday April 29, 2013. The signatures and the letter, condemning the illegal sale of U.S. weapons into Mexico were supposed to have been flown by a blimp flown remotely by the Post for Peace organization but was unable to fly to the embassy due to technical problems. The signatures were eventually hand delivered by the or
/ AP